PLATE XCV. 



Figures magnified 500 diameters. 



Figs. 1-4. BIDDULPHIA TUOMEYII, Bail. Camp. Bay. Schm. At., 119, f. 



1-8 ; T. M. S., 1859, p. , 1, f. 1, 2 ; V. H., 98, f. 2. 3. 



The granules of central part of Fig. 4, arranged 



radially. 

 " 5, 6. SUBORBICULARIS, Grun.; V. H., 100, f. 15, 16. 



Nottingham, Maryland. 

 " 7, (10). RHOMBUS, (Ehrb.), W. Smith, (Zygoceros Ehrb., 



Denticella Ehrb., Oilo/i/cl/a, Kuetz}. 

 " 8, 11-13. ROPERIANA, Grev., V. H., 99, f. 4-6; M. J,, 1859, 



p. 1(53, 7, f. 11-13. The granules are quincunx, 



on all the hoops. 

 Fig. 9. MOBILKNSIS, (Bailey), Grun. Zygoceros, Bailey, 



Biddulphia, Baileyi, W. Smith. Sill. J., 1845, 



p. 336, 4, f. 2, 4; V. H., 101, f. 4-6. 



